. >>> prince george's county is using world aids day to educate students about the disease. an aids awareness seminar took place today. students were able to get their blood tested. the theater group performed skits to get students to talk about prevention. they have the second highest number of hiv aids cases in the state. 5600 people are infected with the disease. 86% of them are african-american. >>> doctors are working to reduce the number of twins born after advanced fertility help. twins have a higher likelihood of premature birth and health problems. the number of larger multiple births increased. a conference for the american society of reproductive medicine discussed the trend and the goal to start with one embryo rather than multiples. >>> a medical technician is accused of infecting dozens in maryland with hepatitis. today, he learns his role. >>> a plane swarmed by paramedics upon landing. >>> today investigators in scotland say the pilot of a police helicopter didn't put out emergency calls just before crashing through the roof of a crowded pub in glasgow last w